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float1.py

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# test basic float capabilities

# literals

print(0.12)

print(1.0)

print(1.2)

print(0e0)

print(0e0)

print(0e-0)

# float construction

print(float(1.2))

print(float("1.2"))

print(float("+1"))

print(float("1e1"))

print(float("1e+1"))

print(float("1e-1"))

print(float("inf"))

print(float("-inf"))

print(float("INF"))

print(float("infinity"))

print(float("INFINITY"))

print(float("nan"))

print(float("-nan"))

print(float("NaN"))

try:

float("")

except ValueError:

print("ValueError")

try:

float("1e+")

except ValueError:

print("ValueError")

try:

float("1z")

except ValueError:

print("ValueError")

# construct from something with the buffer protocol

print(float(b"1.2"))

print(float(bytearray(b"3.4")))

# unary operators

print(bool(0.0))

print(bool(1.2))

print(+(1.2))

print(-(1.2))

# division of integers

x = 1 / 2

print(x)

# /= operator

a = 1

a /= 2

print(a)

# floor division

print(1.0 // 2)

print(2.0 // 2)

# comparison

print(1.2 <= 3.4)

print(1.2 <= -3.4)

print(1.2 >= 3.4)

print(1.2 >= -3.4)

print(0.0 == False, 1.0 == True)

print(False == 0.0, True == 1.0)

# comparison of nan is special

nan = float("nan")

print(nan == 1.2)

print(nan == nan)

try:

1.0 / 0

except ZeroDivisionError:

print("ZeroDivisionError")

try:

1.0 // 0

except ZeroDivisionError:

print("ZeroDivisionError")

try:

1.2 % 0

except ZeroDivisionError:

print("ZeroDivisionError")

try:

0.0**-1

except ZeroDivisionError:

print("ZeroDivisionError")

# unsupported unary ops

try:

~1.2

except TypeError:

print("TypeError")

try:

1.2 in 3.4

except TypeError:

print("TypeError")

# small int on LHS, float on RHS, unsupported op

try:

print(1 | 1.0)

except TypeError:

print("TypeError")

# can't convert list to float

try:

float([])

except TypeError:

print("TypeError")

# test constant float with more than 255 chars

x = 1.84728699436059052516398251149631771898472869943605905251639825114963177189847286994360590525163982511496317718984728699436059052516398251149631771898472869943605905251639825114963177189847286994360590525163982511496317718984728699436059052516398251149631771898472869943605905251639825114963177189

print("%.5f" % x)